1 pound = 0.45 kg
so 130 pound = 130 * 0.45 = 58.50 kg
now,
1 g = 1000 mg
so, 0.324 g = 1000 * 0.324 = 324 mg
As the person is taking 2 tablets with 324 mg each, so 2 tablets have
2 * 324 mg = 648 mg
So a 58.50 kg person is taking 648 mg of aspirin.
So per kilogram body weight we get ,
[tex]\frac{648}{58.50}[/tex] = 11.076 mg
Hence per kilogram dosage will be 11.076 mg